/*
 * Copyright 2012 ETH Zurich, Computer Engineering and Networks Laboratory
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ch.ethz.vizzly.util;

/**
 * This class provides a function for truncating timestamps.
 * @author Matthias Keller
 *
 */
public class TimestampTruncateUtil {

    static public long truncate(long ts, long windowLengthMilli) {
        double t = Long.valueOf(ts).doubleValue();
        double i = Long.valueOf(windowLengthMilli).doubleValue();
        Double trunc = Math.floor((t/i))*i;
        return trunc.longValue();
    }
    
}
